Free Web NovelChapter 703: Chapter 703: Alibi
Lu Chuan explained his reasoning, but it was not evidence.
And this conjecture of Lu Chuan’s was actually considering things from the killer’s perspective.
If Lu Chuan were the murderer, how would he get carbon monoxide into the car without being detected? This was the only way he could think of.
It’s called a hypothetical killer.
"Old Lu, assuming your guess is correct, who could open Wang Chuanzhi’s trunk without him knowing?"
"And even tamper with it to place a carbon monoxide generating device inside?"
Zhang Hui asked questions that clearly pointed in a certain direction.
Family or someone extremely close to Wang Chuanzhi.
Otherwise, how could someone open Wang Chuanzhi’s vehicle trunk?
"And, about this carbon monoxide generating device... is it difficult to make?"
Two questions.
Lu Chuan’s conjecture faced two difficulties.
The first was who could open Wang Chuanzhi’s trunk without alerting him.
Crime Scene Investigation found no signs of tampering on the vehicle. The lock was intact.
The vehicle driven by the deceased, Wang Chuanzhi, had a trunk that could only be opened with the key.
Or through the trunk release button at the driver’s seat.
But either way, the person would need to be skilled at unlocking, just like Lu Chuan found a locksmith who could open the car door in no time.
Or they would have the vehicle’s key.
Second, the carbon monoxide generator...
What is that thing?
"The device is quite simple."
Lu Chuan said, "What we refer to as carbon monoxide poisoning involves gases other than oxygen, like liquefied gas, coal gas, natural gas, etc."
"A regular liquefied gas cylinder could do it."
In fact, gases like liquefied gas have no odor on their own.
The smell we often associate with liquefied gas is due to agents added during processing to ensure leaks can be detected, preventing poisoning.
"Anyone with basic chemistry knowledge wouldn’t find it hard to produce carbon monoxide gas."
"So you’re suggesting focusing the investigation on the two deceased, especially Wang Chuanzhi’s relatives?"
Zhang Hui understood Lu Chuan’s intention.
If the killer could open the trunk and place the carbon monoxide without alerting Wang Chuanzhi, it means they knew him.
And the relationship was close enough to at least get Wang Chuanzhi’s car key.
Lu Chuan nodded, "I feel we need to dig deeper."
"Of course, all this is premised on our conjecture being correct."
"I think we should pursue Director Lu’s line of thought."
Someone agreed with Lu Chuan’s opinion.
"Yes, there was an extramarital affair between the two victims."
"Although current investigations show the victims had decent relationships with their families, this is just one side of the story."
"Whether the spouses knew about the relationship between the victims, no one can say for sure."
Someone else agreed with Lu Chuan’s proposal.
"Zhang Hui, how is your investigation going?"
Qin Yong did not express an opinion but turned to Zhang Hui.
After the incident, the action team was responsible for investigating the interpersonal relationships of the two victims.
Both Wang Chuanzhi and Zhang Cuilian’s spouses were questioned by Zhang Hui personally.
Lu Chuan returned to his seat from the projection screen, ready to hear Zhang Hui’s investigation results.
The Crime Scene Investigation team was only responsible for evidence analysis.
Lu Chuan, along with Yang Lin, Yang Sen, and others, provided conjectures from Crime Scene Investigation based on the examination of the deceased’s vehicle.
It was merely a possible development in the case.
But whether the truth is indeed like this remains to be investigated.
"After confirming the identities of the two deceased, we immediately notified the victims’ families."
Zhang Hui began reporting the situation: "The deceased Wang Chuanzhi’s home is local, and his wife is also in Haizhou City. This morning, we questioned Wang Chuanzhi’s wife, Xu Qianqian."
"We focused on learning about Wang Chuanzhi’s personal situation from Xu Qianqian, as well as some information about Xu Qianqian herself."
"We’ll start with Xu Qianqian. Due to the extramarital relationship between Wang Chuanzhi and Zhang Cuilian, Xu Qianqian is our main suspect."
"Although Xu Qianqian denied knowing about Wang Chuanzhi and Zhang Cuilian’s relationship, we still investigated her whereabouts."
"The deceased Wang Chuanzhi left home for work on the morning of the 17th at 7:00."
"This was the last time Xu Qianqian saw Wang Chuanzhi."
"We have checked the surveillance at the entrance of Wang Chuanzhi’s residential area."
"Look here," he said, pointing to the projection, "it’s a screenshot from the surveillance at the gate when Wang Chuanzhi’s vehicle exited the community."
"From this, it’s clear that Wang Chuanzhi was the only person in the car."
"Afterwards, we also investigated Wang Chuanzhi’s company."
"The car entered the company underground parking lot at 7:28."
"This timing aligns with the estimated drive time from his house to the company."
"Moreover, during this journey, we checked Wang Chuanzhi’s call records: no one called him, nor did he make any outgoing calls."
"Afterwards, Wang Chuanzhi was at the company until he left at 6:30 in the afternoon."
"From the phone and chat records of Wang Chuanzhi and Zhang Cuilian, they agreed the previous day at 11 am to meet that evening."
"At 6:00 in the afternoon, Wang Chuanzhi called his wife Xu Qianqian to say he had a social engagement that night."
"After that, he left the company and went directly to the vicinity of the City Public Security Bureau residential area gate."
"During this time, Xu Qianqian was at home and didn’t leave."
"This is the community’s internal surveillance video. On the day of the incident, Xu Qianqian went downstairs three times."
"Once in the morning to take out the trash."
"Another time to walk the dog, but remained within the community, caught multiple times by surveillance."
"The last time was around 3 pm."
"This time, she left the community to buy groceries at the supermarket at the entrance."
"We checked the surveillance and her payment record."
"Afterwards, Xu Qianqian stayed in the community until this morning when we notified her of Wang Chuanzhi’s death."
"The timeline is complete, and Xu Qianqian did not leave the community, so based on current investigation results, Xu Qianqian had no time to commit the crime."
The detail in the investigation by the second action team was meticulous.
Given the special relationship between the two deceased, Wang Chuanzhi and Zhang Cuilian, the second action team focused their suspicion initially on the spouses of both victims.
And Wang Chuanzhi’s wife, Xu Qianqian, had continuous presence within the community.
She had a solid alibi.
